Which of the following is NOT a common use for flexible non-metallic pipe?

Flexible non-metallic pipes are commonly used in various applications due to their resistance to corrosion, lightweight nature, and ease of installation. However, they are not typically used for high-pressure gas piping. This is because high-pressure systems often require materials that can withstand significant stress and strain, which non-metallic materials may not be capable of handling safely. In contrast, materials such as steel and other metals are preferred for high-pressure gas systems due to their strength and ability to maintain integrity under pressure.

Instrumentation tubing, water and steam piping, and sample coolers are applications where flexible non-metallic pipe can be effectively utilized, as these do not typically involve extreme pressures that would compromise the pipe’s integrity. Therefore, flexible non-metallic pipes are suitable for these uses, while high-pressure gas piping is more demanding in terms of pressure tolerance and safety, explaining why it is considered an outlier in this context.